Oct-1-en-3-one


Oct-1-en-3-one (CH<sub>2</sub>=CHC(=O)(CH<sub>2</sub>)<sub>4</sub>CH<sub>3</sub>), also known as 1-octen-3-one, is the odorant that is responsible for the typical metallic smell of metals and blood coming into contact with skin.[1] Oct-1-en-3-one has a strong metallic mushroom-like odor with an odor detection threshold of 0.03 - 1.12 µg/m<sup>3</sup> and it is the main compound responsible for the "smell of metal", followed by decanal (smell: orange skin, flowery) and nonanal (smell: tallowy, fruity).[2] Oct-1-en-3-one is the degradative reduction product of the chemical reaction of skin lipid peroxides and Fe<sup>2+</sup>. Skin lipids are formed from skin lipid by oxidation, either enzymatically by lipoxygenases or by air oxygen. Oct-1-en-3-one is a ketone of the alkene 1-octene.